Berea Sandstone™ Petroleum Cores

For the past 30 years, Berea Sandstone™ core samples have been widely recognized by the petroleum industry as the best stone for testing the efficiency of chemical surfactants.

Berea Sandstone™ is a sedimentary rock whose grains are predominantly sand-sized and are composed of quartz held together by silica. The relatively high porosity and permeability of Berea Sandstone™ makes it a good reservoir rock.

There are 3 variations of the sandstone used for our core samples:

"Split Rock" has visible laminations but can be classified as homogeneous. This usually offers the lower mD ratings.

"Liver Rocks" has very little, to no visible laminations and is considered homogeneous. This is our most prevalent core rock, and runs in the 200-500mD ranges. Some of these samples have readings as high as 700mD.

"Dundee" samples are from the Massilon Formation. While having consistent porosities and densities to our Berea Sandstone™, our Ohio Sandstone samples are not considered homogeneous. Its laminations do not run parallel to each other and is very porous, therefore yielding the higher ratings of 900mD-2500mD.

We currently have core material available in ranges from 19mD thru 2500mD, with ambient porosities from 13% to 23%.